Abstract

Interfacial magnetic interactions between different elements are the origin of various spin-transport phenomena in multi-elemental magnetic systems. We investigate the coupling between the magnetic moments of the rare-earth, transition-metal, and heavy-metal elements across the interface in a GdFeCo/Pt thin film, an archetype system to investigate ferrimagnetic spintronics. The Pt magnetic moments induced by the antiferromagnetically aligned FeCo and Gd moments are measured using element-resolved x-ray measurements. It is revealed that the proximity-induced Pt magnetic moments are always aligned parallel to the FeCo magnetic moments, even below the ferrimagnetic compensation temperature where FeCo has a smaller moment than Gd. This is understood by a theoretical model showing distinct effects of the rare-earth Gd 4f and transition-metal FeCo 3d magnetic moments on the Pt electronic states. In particular, the Gd and FeCo work in-phase to align the Pt moment in the same direction, despite their antiferromagnetic configuration. The unexpected additive roles of the two antiferromagnetically coupled elements exemplify the importance of detailed interactions among the constituent elements in understanding magnetic and spintronic properties of thin film systems.

Details

Title
Additive roles of antiferromagnetically coupled elements in the magnetic proximity effect in the GdFeCo/Pt system
Author
Kee, Jung Yun 1 ; Kim, Kook Tae 2 ; Lee, In Hak 3 ; Seo, Ilwan 2 ; Chang, Jun-Young 4 ; Lee, Ah-Yeon 5 ; Noh, Woo-suk 6 ; Chang, Young Jun 7 ; Park, Seung-Young 8 ; Choe, Sug-Bong 9 ; Kim, Duck-Ho 3 ; Kim, Kyoung-Whan 10 ; Choi, Yongseong 11 ; Lee, Dong Ryeol 2 ; Choi, Jun Woo 3 

 Korea Institute of Science and Technology (KIST), Center for Spintronics, Seoul, Korea (GRID:grid.496416.8) (ISNI:0000 0004 5934 6655); Soongsil University, Department of Physics, Seoul, Korea (GRID:grid.263765.3) (ISNI:0000 0004 0533 3568) 
 Soongsil University, Department of Physics, Seoul, Korea (GRID:grid.263765.3) (ISNI:0000 0004 0533 3568) 
 Korea Institute of Science and Technology (KIST), Center for Spintronics, Seoul, Korea (GRID:grid.496416.8) (ISNI:0000 0004 5934 6655) 
 Korea Institute of Science and Technology (KIST), Center for Spintronics, Seoul, Korea (GRID:grid.496416.8) (ISNI:0000 0004 5934 6655); Seoul National University, Department of Physics and Astronomy, Seoul, Korea (GRID:grid.31501.36) (ISNI:0000 0004 0470 5905) 
 Korea Basic Science Institute (KBSI), Center for Research Equipment, Division of Scientific Instrumentation & Management, Daejeon, Korea (GRID:grid.410885.0) (ISNI:0000 0000 9149 5707) 
 Korea Foundation for Max Planck POSTECH/Korea Research Initiative, Pohang, Korea (GRID:grid.495999.1) 
 University of Seoul, Department of Physics, Seoul, Korea (GRID:grid.267134.5) (ISNI:0000 0000 8597 6969) 
 Korea Basic Science Institute (KBSI), Center for Scientific Instrumentation, Division of Scientific Instrumentation & Management, Daejeon, Korea (GRID:grid.410885.0) (ISNI:0000 0000 9149 5707) 
 Seoul National University, Department of Physics and Astronomy, Seoul, Korea (GRID:grid.31501.36) (ISNI:0000 0004 0470 5905) 
10  Korea Institute of Science and Technology (KIST), Center for Spintronics, Seoul, Korea (GRID:grid.496416.8) (ISNI:0000 0004 5934 6655); Yonsei University, Department of Physics, Seoul, Korea (GRID:grid.15444.30) (ISNI:0000 0004 0470 5454) 
11  Argonne National Laboratory, Advanced Photon Source, Argonne, USA (GRID:grid.187073.a) (ISNI:0000 0001 1939 4845) 
Pages
9476
Publication year
2024
Publication date
2024
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3046636248
Copyright
© The Author(s) 2024. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.